QT5 QMessageBox 定时关闭

    QMessageBox *box=new QMessageBox(this);
    QTimer::singleShot(10000, box, SLOT(accept()));
    QTimer::singleShot(1000, box, [box]() 
                                  { 
                                    int tt=1,t=10;
                                    QDateTime MAspaceTime=QDateTime::currentDateTime();
                                    bool SendTWeb;
                                    do{
                                        SendTWeb=(MAspaceTime.secsTo(QDateTime::currentDateTime())>10);
                                        if (MAspaceTime.secsTo(QDateTime::currentDateTime())>=tt){
                                          tt++;
                                          box->setWindowTitle(tr("%1").sprintf("提示%d秒后关闭",t--));
                                          qDebug()<<MAspaceTime.secsTo(QDateTime::currentDateTime());
                                          if (box->isHidden()) break;
                                        }
                                        QApplication::processEvents();
                                    }while(!SendTWeb);
                                  }
                        );
    box->setAttribute(Qt::WA_DeleteOnClose);
    box->setIcon(QMessageBox::Information);
    box->setWindowTitle(tr("提示10秒后关闭"));
    box->setText(tr("测试计时关闭"));
    box->exec();